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Reports <code>abstract</code> classes that have no <code>abstract</code> methods.
In most cases it does not make sense to have an <code>abstract</code> class without any <code>abstract</code> methods,
and the <code>abstract</code> modifier can be removed from the class.
If the class was declared <code>abstract</code> to prevent instantiation,
it is often a better option to use a <code>private</code> constructor to prevent instantiation instead.
<p><b>Example:</b></p>
<pre><code>
  abstract class Example {
    public String getName() {
      return "IntelliJ IDEA";
    }
  }
</code></pre>
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<p>Use the option to ignore utility classes.
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